well yes the draft could be the issue, it has been very cold lately & extra windy too.
Try it, or put a mini trellis in the pot & wind the vine around that some. (you can make a trellis out of a number of items.) Just use something that you can prop the vine up on. But as long as you do not have animals I think it should be ok on the floor.
I have never done any cuttings, do you have any suggestions on how to do them?
Take stem tip cuttings about 6 inches long from healthy devil's ivy stems, making the cut with a sharp knife at least an inch below a leaf. later when it has rooted & you plant it, each section will produce a new plant from the eye or node in the leaf axil.
What I found also says to plant the cutting right away & cover it with a plastic bag & keep the soil moist & to NOT let it sit in water. BUT I have been propagating mine in water for over 30 years & it works like a charm. I plant them when they have nice long roots. I also have some I just keep in a vase of water.
Ok that is the official way--I just cut a piece off that has a long enough stem to let it sit in water----really it is way easy. just make sure the cut end is a nice clean fresh cut so it will absorb water easily.